Portable pneumatic motor.



R. A. NORL'ING. PORTABLE PNEUMATIO MOTOR.

PATENTBD APR. 18, 1905.

APPLIGATIUN FILED NOV. 19, 1903.

s SHEETS-SHEET 1.

PATBNTBD Amma, 1905.

R. A. NORLING. PORTABLE PNEUMATIG MOTOR.

APPLIGATION FILED NOV.19. 1903.

a SHEETS-SHEET l2.

@w @M M No. 787,586. Y PATENTBD APR.

. R. A. NORLING.

f n PORTABLE PNBUMATIO MOTOR.

APPLICATION FILED NOV. 19, 1903.

. 3 SHEETS-SHE UNITED STATES Patented April 18, 19C 5.

i PATENT OEEICE.

REINHOLD A. NORLING, OF AURORA, ILLINOIS, ASSIGNOR TO AURORA AUTOMATIC MACHINERY COMPANY, OF AURORA, ILLINOIS, A COR- PORATION OF ILLINOIS.

PORTABLE PNIEUNIATIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 787,586, dated April 18, 1905. Application filed November 19, 1903. Serial No. 181,803.

To all whom, t may concern/.-

Be it known that I, RETNHOLD A. NORLING, a citizen of the United States, and a resident of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful ,Improvements in Tool Feeding and Ejecting Devices for Portable Pneumatic Motors; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. Y This invention relates to improvements in tool feeding and ejecting devices for pneu'- matic drills or mechanisms of that kind embracing a fluid-pressure engine of portable form applied to operate a drill or like tool.-v

My invention embraces the matters hereinafter described, and pointed out in the ap'- pended claims.

In the accompanying drawings, illustrating l my invention, Figure l is a'sectional view of a machine embodying my invention, taken through the central axis of the tool-actuating spindle thereof. Fig. 2 is a detail section taken through the feed-spindle of the machine. Fig. 3 is a cross-section taken on line 3 3 of Fig. 2. Fig. 4 is a cross-section of the machine, taken on line 4 4 of Fig. l.

As shown in said drawings, A indicates the main casing of the machine, which in general form is of sector shape and contains four power-cylinders, three of which are indicated in the drawings by B, C, and B, a crankchamber D, and an air-supply chamber E. The main casing A is provided at its side adjacent to the crank-shaft chamber D with a handle A', and a handle is `formed on the opposite side of the casing by means of an airsupply pipe Q, which communicates with and supplies air to the said chamber E. The four power-cylinders are arranged in pairs with the two cylinders constituting each pair parallel with each other and the central axes of the cylinders of each pair at right angles to the centralaxes of the cylinders of the other pair'.

shownin the drawings, Fig 4, the lei-,

ters B and C indicate the two cylinders at the top of the casing, which are arranged at an angle to each other with their axes in the same plane and one of which belongs to each pair. In Fig. 1, B indicates the uppermost, and B the lowerrnost, cylinder of one of the pairs of cylinders. The, air-supply chamber E is located in the sector-shaped space between the pairs ofcylinders. l E and E2 indicate oscillatory plug-valves whichcontrol the supply of pressure iiuid t0 and its exhaust from the cylinders, the plug- Avalve E2 being associated with the pair of cylinders B and B', while the plug-valve E is associated with the pair of cylinders, the uppermost one of which is indicated by C in Fig. 4. In each of the cylinders is located a piston, of which those belonging to the cylinsaid Fig. 4 the connecting-rods belonging to the pistons b and `0 are indicated by b2 and c2, and the connecting-rods belonging to the lower cylinders are indicated by b3 and c3. In Fig. l the connecting-rod belonging to the cylinder B is indicated by b2 and that belonging to the cylinder B by 723. Said crank-shaft has a bearing f in the main casing A at one end of the crank-chamber and at its opposite end has a bearing g, formed in a cap or auxiliary cas ing G, which is secured to what may be called the lower face of the main casing A.

H indicates the main driving-spindle of the machine, through which motion is transmitted 4to the rotative tool or other part to be driven.

I guide-passage is located an endwise sliding or movable tool-ejecting pin H3. Said pin H3 has a head at its lower end and a nut at its upper end and is adapted to project at its upper end above the inner or upper end of the spindle H, so that pressure m'ay be brought on its said upper end for the purpose of forcing the pin endwise through the spindle against the inner end of the tool-shank held therein for the purpose of loosening` or dislodging the same.

In the casing A in axial alinement with the tool-carrying spindle H is arranged a telescopic compound feed-screw, which, as herein shown, consists of acentral spindle O and inner and outer internally-screw-threaded sleeves P and P. Said central spindle is provided at its lower end with screw-threads 0 to engage the internal screw-threads on the inner sleeve P, while the said sleeve P is provided at its lower end with external screwthreads p, adapted to engage internal screwthreads of the external sleeve P', which latter sleeve is stationary and is secured at its upper or outer end to the top wall of the casing A and extends inwardly into the space or chamber E3 between the upper cylinders E and C. The said space or chamber E3 is shown as separated from the air-supply chamber E by means of a partition-wall e. The upper end of the spindle H terminates adjacent to the bottom of the chamber E3, so as to leave room in the main part of said chamber for the parts constituting the telescopic feed-screw. As shown in the drawings, the upper wall of the casing A is provided with a tubular projection ci', having an internal cylindric surface in which the exterior surface of the sleeve P fits, said sleeve having at its upperend an outwardly-projecting annular fiange p', which has screw-threaded engagement with the sleeve a'. The sleeve is held rigidly in place bya lock-ring or annular nut p2, inserted in the screw-threaded end of the sleeve ct' over the flanged upper end of said sleeve P. The sleeve P' is thus held rigidly on the top wall of the casing and projects downwardly into said casing to a point near the upper or inner end of the driving-spindle H. Said stationary sleeve P is provided at its upper end with an internal cylindric bearing-surface P3 for contact with the smooth external surface of the inner tube P. Said inner tube P is likewise provided at its upper or outer end with an internal cylindric bearing-surface P4,

through which slides the smooth upper portion of the spindle O. Said spindle is provided above the upper end of the inner tube Pwitha handle O', preferably having four arms or levers and which is rigidly attached to the said spindle by means of a set-screw 0. The upper end of the spindle O is made conical to engage the object against which the feedscrew bears during the operation of the machine.

It will be manifest from the above that the telescopic feed-screw made as described affords a considerable range of movement in the tool while maintaining a compact construction in the parts, it being obvious that the feed-screw may be operated to advance the tool until the spindle O has been carried to the top of the inner tube P and said inner tube P has been carried to the top of the outer tube P. Moreover,the construction by which the stationary tube P is attached at its outer end to the wall of the casing and extends into the space or chamber E3 between the cylinders B and C enables the movable members O and P to be brought for a considerable part of the length thereof into the casing, so that when the feed-screw is contracted the motor may be introduced into a confined space or used where the rest against which the outer end of the spindle O bears is at a short distance only from the work or object to be operated upon by the tool.

The inner end of the spindle O is adapted for contact with the outer or upper end of the tool-ejecting pin H3, it being understood that the parts will be so arranged that when the spindle O of the feed-screw is near the inward limit of its movement it will come in contact with the outer end of the ejecting-pin, and thereby force the same inwardly and thrust the tool from its socket in the tool-carrying spindle.

I claim as my invention- 1. In a portable pneumatic motor the combination of a rotative tool-carrying spindle provided with a recess adapted to receive the shank of a tool, an endwise-movable ejectingpin mounted in the inner end of said spindle, and a feed-screw mounted in the casing and adapted for contact with the outer end of said ejecting-pin when said feed-screw is near the inward limit of its movement and which is adapted to force said pin inward to eject the tool from said tapered recess.

2. In a portable pneumatic motor, the com- IOO IIO

bination with the casing thereof containing n tative spindle provided at its outer end with means by which it may be turned by hand, and a plurality of telescopic tubes which have screw-threaded engagement with each other, the innermost of said tubes having screwthreaded engagement with said central spi-ndle, and the outermost of said-tubes being rigidly attached at its upper end to the upper wall of the casing and extending at its lower end into the said space or chamber so that the moving parts of the screw will project from 

